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A. J. ROSENTRETEFL DOOR HANGER.

APPLICATION FILED APR. 10. I916.

Patented Octl 2i L819AQQ,

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THE COLUMBIA PLANOGRKPH c NTTED STATES FATENT OFFICE,

ALBERT T.- EOSENERETER,,OF1BOONTON, NEW JERSEY, AS SIG N ORTO EDGABZABRISKIE, OEMAIPLEWOOD, NEW JERSEY, AND FRANKE. HUTGI-IINS, OF NEW YORK, III-Y.

DOOR-HANGER.-

Specification of Letters Patent.

Patented Oct. 21, 1919.

Application filed April 10, 1916. Serial No. 90,043.

To all whom it may concern.-

Be it known thatT, ALBERT J. RosEN'rnnrun, a citizen of the United States, and a resident of Boonton, in the county of Morris and State of New Jersey, have invented certain new and useful Improvements in. Door-Hangers, of which the following is a specification.

The invention pertains more particularly to door hangers adaptedfor sliding doors, and'the object of the invention is to provide a highly improved and simplified construction of hanger adapted for eilicient use and to be as noiseless as possible during the sliding motion of the door or doors.

A further purpose of the invention is to provide a hanger structure Which will not only be efhcient, stron r and durable, but capable of being manufactured at a minimum expense and with the use of simple machinery, one specific object being to .elimis nate the necessity for employing drawn nietal' hangers or tracks for the balls and to avoid the expense incident to the drawing of these metal parts and of the machinery for performing the work.

1 illustrate my tion as applied to two-speed sliding doors employed for elevator shafts, but it is apparent that the invention is. applicable to a single door as well as to a plural arrangei ment of doors.

The invention will be fully understood from the detailed description hereinafter presented, reference being'had to the accompanying drawings, in which:

F'gure 1 is a vertical transverse section, partly broken away, of a pair of tworspeed sliding doors equipped with the features constituting my invention.

Fig. 2 is a longitudinal section, partly broken away, through the same, taken on the dotted line 2-2 of Fig. 1;

Fig. 3 is a horizontal section through a portion of the same, taken. on the dotted line 33 of Fig. 1, and

Fig. 4 is a corresponding section through one of the plates illustrated in Fig. 3, the dotted lines indicating the bolt in one of its positions. y

In the drawings. 10 indicates the door framing, and 12, 13 respectively, designate the sliding doors, mechanism being provided whereby the door 13 moves more slowly than the door 12 during the opening invention in this applica and closing movements of the doors and whereby both. doors attain their open and closed positions at about the same time. The doors 12, 13 are commonly called twospeed sliding doors, and this feature in itselfis not novel. 7

Above the doorway 1 1 the frame 10 has secured to it an angle iron bar whose vertical flange 15 is flat against the frame 10 above the doorway 14 whose horizontal member 16 is slightly below the lintel of the door and serves as a support for the mechanism connected with the upper ends ofthe doors for hanging them and providing for their sliding movements.

The doors 12, 13 are equipped with correspending mechanisms, and each door has secured upon its upper edge two box-plates 17, each of which has an opening 18 in its upper side freely receiving a nut or internally threaded bushing or sleeve 19 having side trunnions 20adapted to bearings 21 formed integrally with the lower surface of the box-plates 17 The trunnions 20. permit the sleeve or bushing 19 to have a slight swiveling action adapting them to any inequalities in hanging the doors, as hereinafter explained. The sleeves or bushings 19 receive the lower ends of threaded bolts 22, andhpon these bolts are provided jam nuts 23 at the upper ends of the sleeves or bushings 19. The bolts 22 have at their upper ends heads 24 and immediatelybelow said heads annular shoulders 25, below which the bolts have a smooth section 26, and below said section 26 the bolts are threaded to engage the internal threads of the sleeves or bushings 19 and be engaged by the internal threads of the nuts 23. The bolts 22 are also provided below their heads 24 with j am nuts 27. The bolts 22 are suspended from angle plates 28 which in turn are suspended from the rider bars 29, and the rider bars 29 are hung upon the. balls 80 which are held in raceways 31 in dependent hanger bars 32 which are secured by screws 33 to the lower surface of the horizontal member 16 of the angle iron bar 34.

The rider bars 29 extend thefull width of the doors, and at each door I connect a rider-bar by two of theplates 28, bolts 22 and box-plates 17 with the door.- The rider mars 29, in the construction. illustrated, comprise two plates whose lower portions are in face to face engagement and iii) receive the plates 28 and whose upper portions diverge upwardly and outwardly and then" curve inwardly over the balls 30 and hang upon said balls 30,'extending along the outer sides of the balls and then turn-. ing inwardly above the same, as at 35, the portions constituting hanger tracks, as they may be called for convenience, adapted to be suspended from and travel on the balls 30. The plates constituting the rider-bar 29 will be formed of sheet steel and may be readily formed in a well-equipped shop by ordinary tools and without the use of drawing machines. The upper members 35 of the rider-bar 29 are separated from each other at their upper edges and straddle the lower portion of the hanger bar 32, which is a solid bar extending lengthwise above the upper edge of the door and secured to the horizontal member 16 of the angle plate orbar 34 by means of the screws 33, as hereinbefore explained. I V

The hanger bars 32 are of substantial character and have the grooves or raceways 31 formed in their opposite sides, and upon this hanger bar is applied the ball-retainer 36 which is of metal and substantially of U-shape in cross-section and extends upwardly at opposite sides of the hanger-bar 32 and is formed with openings 37 for the outer portions of the balls 30. At opposite sides of the openings 37 are lips 38 pressed outwardly from the sides of the retainer so as to confine the balls 30 and prevent any possibility of their losing their correct spaced relation. The halls are expose above and below the lips 38 as will be understood on reference to Figs. 1 and 2.

I preferably provide a hood 39 to substantially inclosc the hanger-bar 32, balls 30, ball retainer 36 and upper portions of the rider-bar 29, as shown at the right hand side of F 1, and this hood is rectangular in crosssection and of metal and open at its lower central portions to permit the'riderbar tohave its proper traveling movement, while atits upper portion said hood lies between the hanger-bar 32 and horizontal member 16 of the angle plate 34 and is secured in position by the same screws 33 em ployed to fasten the hanger-bar 32. The

ball retainer 36, balls 30 and rider-bar 29 are free to travel along the hanger-bar 32, but in accordance with well-i'lnderstood principles, the ball retainer 36 and ba-lls 30 do not travel at the same rate of speed as that of the door to which they are applied. The hood 39 I consider to be of considerable importance in that it conceals many of the moving parts from view and excludes in large measure dust and lint and the'like from'entering between the traveling surfaces of the hanger. It is important that the moving parts of the hanger should be kept S ee as possible from the accumulation V ings 45 in the plates 28 are wide of dust and grit, since otherwise the hanger is likely to become injured, unsatisfactory and noisy. I so construct the moving parts of my hanger that. they may be suitably 1nclosed by a hood 39, which may be easily made of sheet metal and present smooth exterior surfaces and be held in place by the same screws which secure the hanger bar.

The hanger-plates 28 are concaved horizontally along their upper portions, as at 40, and secured to the lower vertical portions of the rider-bars 29 by means of rivets 41 having outer heads whose inner surfaces are convex and conform to the concavity in said plates 28. I preferably do not rivet the plates 28 tightly against the side of the riderbar 29, but allow for some little free- 7 dom for said plates 28 to swing upon said rivets 41, the purpose being, in' the preferred construction, to arrange for a flexible connection of the plates 28 to the rider-bar 29, this being for the purpose of permitting the door, even though it may be somewhat badly hung by an incompetent workman, to gain its true vertical line even though some of the parts of the hanger might have been in some, respects improperly secured or arranged with relation to each other. The lower horizontal members of the plates 28 1 number 42, and these members 42 have a slot or opening 43 (Figs. 3 and 4) which is of somewhat oval shape and narrower at its open end 44 than at its sides or inner closed end. The slot or opening 43' is a continuation of a wider slot or opening formed in the vertical portion of the plates 28 above said horizontal portion 42. The bolts 22 are engaged by the plates 28, and the head 24 on these bolts is wider than the opening 43 and of less width than the opening 45 in said plates, and the shoulder 25 on the bolts 22 may easily fit, between the sides of the opening 43 but cannot pass through the narrow portion 44 of said open ing. When the parts are in their operative position shown in Fig. 1, the bolts 22 cannot slip from the plates 28 suspending them, but an occasion might aris when it would be desired to detach the. door from the hanger, and this result may be readily accomplishedby loosening the jam nuts 27 and then elevating the door until the shoulders 25 on the bolts 22 are above the level of the horizontal members 42 of the plates 28 andthen moving said door outwardly to carry said shoulders 25 and the heads 24 on the bolts 22 outwardly through the-vertical openings 45 in the plates 28. The open- 7 enough to permit the shoulders 25 and bolt-heads 24 to pass through them, but the door cannot be detached from the plates 28 until it has been sulliciently elevated for the shoulders 25 on the bolts to ascend above the narrow open ends 44 of the openings The door may be restored to the plates 28 by slipping the bolt heads 24 and shoulders 25 through the openings 45 in said plates and then allowing the door to settle until the heads 24 rest upon the upper surface of the members 42 of said plates and the shoulders 25 have entered the openings 43, after which the jam-nuts 27 should be tightened to assure a firm connection of the door with the plates 28.

In addition to the flexible connection of the upper ends of the plates 28 with the rider-bar 29, the lower ends of the bolts 22 by reason of their engagement with the bushings or sleeves 19 afford, due to the trunnions 20, a further flexible connection the door with th rider-bar, and hence the door is well adapted to aline itself regardless of slight imperfections either in securing the parts of the mechanism in position or connectlng the same wlth the door. It may not be necessary to loosely connect the upper enr s of the plates 28 with the rider-bar when p the rockable bushing or sleeve 19 is made use of, and in any instance in which either flexible connection is to be omitted, I would omit the flexible connection of the plates 28 with the rider-bar,in that instance merely riveting the upper ends of said plates tightly against said bar.

The rider bar 29 for the door 12 has secured to its inner face a rack bar 46, and upon the vertical member 15 of the main supporting angle plate 34 I secure a corresponding rack bar 47, said bar 47 being positioned to be at the back of the door 13 when said door is in its closed position. Intermediate the rack bars 46, 47 and engaging both thereof is the pinion or gear wheel 48 which is disposed horizontally and held in a forked frame 49 which is pivotally secured by a vertical pin 50 to a strap 51 fastened to the rider-bar of the door 13. The swiveling of the frame 49 for the gear wheel 48 is of considerable importance in avoiding any binding of the wheel between the racks 46, 47 in the event of any irregularities in the same or in the securing of the parts of the hanger in position. The rack bars 46, 47 and gear wheel 48- cooperate in allowing the doors 12, 13 to have a two-speed movement, the door 12 traveling more rapidly than the door 13 and both reaching their open posi tion and closed position together in accordance with well understood principles. The only novel feature in respect to the racks and gear wheel is in disposing said racks and gear wheel horizontally and flexibly mounting the gear wheel.

The invention and its method of use will be understood from the foregoing description without further detailed explanation. Each door is hung by corresponding parts affording an anti-friction bearing, with the rider-bar flexibly connected with the door composed of members passing along the outer sides of and over the balls and hangs ing thereupon, the balls being held in aceways in the depending hanger bar 32. The hood 39 inoloses the hanger bar,

balls and those portions of the rider-bar which engage the balls. The rider-bar carries the hanger plates 28, and tliedoor is, by the'means hereinbefore described, hung from said plates and is capable of being withdrawn therefrom with the minimum effort. The door is flexibly connected with the rider -bar, as hereinbefore explained. The raceways may be milled in the sides of the solid bar 32, and hence with the use of ordinary tools and machinery entirely true raceways or tracks may be provided for the balls 30, this resulting in the mechanism creating the minimum amount of noise in the use of the doors. It is one of the purposes of the invention to avoid the excessive noise which is incident to the use of drawn tube tracks supporting the balls in door hangers in common use.

My invention is not limited in all of its parts to use in connection with variable speed doors, but is applicable to single doors, since the hanger features are merely duplicated for each door. When the invention is employed in connection with individual doors, the rack bars and gear wheel will be omitted, but when employed in connection with plural doors, said rack bars and gear wheel will be made use of. The doorway will be provided at its sill with the usual runways, not shown, for the lower edges of the doors.

What I claim as my invention and desire to secure by Letters Patent, is:

1. In a door-hanger, in combination, a door and door-framing, a hanger-bar, means rigidly securing said hanger-bar at its upper edge in stationary position and connecting the same with said framing, said hangerbar being a solid bar having raceways in its outer opposite vertical sides, balls in said raceways, a rider-bar having upper opposite members extending along the outer sides of and over and hanging upon the exposed sides of said balls, means connected with the door and said rider-bar below said hanger-bar and suspending the door from said riderbar, and an inverted U -shaped hood extending over and at opposite sides of said hanger-bar and the upper members of said rider-bar and being secured upon the top of said hanger-bar, said hood being open between its lower side portions to permit of the travel of said rider-bar.

2. In combination, a door, hanger meehanismtherefor comprising ball-bearings and a riderbar engaging the same, and means connecting the door with said rider-bar comprising a plate connected with said bar, a

bolt connected with said plate, a threaded.

bushing engaged by said bolt, and a box- 1' ceways,

plate secured to the door and having hearings at its lower side, said bushing having trunnions adapted to said bearings for flexibly suspending the door. 7

3. In combination, a door, hanger mechanism therefor comprising ball-bearings and a rider-bar engaging the same and means connecting the door with said rider-bar comprising a plate connected with said bar, a part connected with said plate having laterally extending trunnions and bearings secured to the door and engaged by said trunnions, whereby the door becomes flexibly suspended.

Signed at Aurora, in the county of Kane 15 and State of Illinois this 4th day of April, A. D. 1916. Q

ALBERT "J. ROSENTRETER.

Witnesses:

FREDERICK A. SUTPHEN, FRANK E. HUToHINs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

7 washington, D. O. 

